Question

An electron (mass: 9.11 × 10-31 kg) and a proton (mass: 1.67 × 10-27 kg) are each accelerated from rest through a potential difference of 15 V that spans 15 cm. Which one takes less time to cover the 15 cm distance?
It's a tie—each reaches 15cm at the same time.
There isn't enough information given to answer this question.
The electron beats the proton.
The proton beats the electron.